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bug#16497: 24.3.50; `move-to-column' ignores invisible text at the begin

From: Bastien
Subject: bug#16497: 24.3.50; `move-to-column' ignores invisible text at the beginning of the line, which create problems when using string-rectangle
Date: Mon, 20 Jan 2014 10:11:28 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux)

Stefan Monnier <address@hidden> writes:

> Indeed.  And it's not the right choice in your case.  But I'm pretty
> sure it is the right choice in other cases.

I agree.

> Maybe we should make move-to-column pay attention to stickiness so that
> you con control where it stops by playing with text-properties's
> stickiness (or overlay's insertion types).

Another way is to have a parameter to possibly ignore invisibility
specs altogether.

If we rely on stickiness, then the fact that front-sticky is nil by
default suggests that (move-to-column 0) should ignore invisible text
while going back to the beginning of the line, because you don't want
to leave the point in a position where it will inherit from the
previous invisible property.  But this interpretation seems fragile.

> But just changing the behavior from one side to the other will just fix
> it in some cases and break it in others.

Yes, agreed too.


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